The Worst Episodes of What on Earth?

Evidence of human activity is found in strange times and places, and a new perspective on a biological activity known since the nineteenth century.

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Five discoveries are probably related to potential warfare and one possibly to wildlife.

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Major natural anomalies and varied human activities are investigated.

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We investigate two examples of human activity in the U.S.A., one in Africa and one in Asia, with two natural phenomena where ice is a major factor.

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We investigate two examples of men at war, and two engaging with water, but another vision is in the eyes of the beholders, and the last phenomenon is a severe natural event.

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We investigate one natural phenomenon, four shapes that look like being of human origin, and monitor one example of human origin and current destruction.

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Strange spots near the Grand Canyon may hold clues to the legendary treasure of a notorious bandit. Satellite images could explain desert ruins rumored to be an entrance to an underworld. A city-size chunk of ice suddenly disappears in Antarctica.

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A giant carving of a strange creature suddenly appears in the Australian Outback. Mysterious bright green lights illuminate the seas around Thailand. Top secret activity is discovered at Iran's nuclear facility.

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Strange black holes appear near Egypt's ancient pyramids, and new evidence points to a disturbing conclusion. Ruins in Peru suggests that the Inca people knew far more than previously thought. A mysterious red swarm invades a beach in India.

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Legends of ancient giants surround a mysterious monument in the Holy Land. A bright pink lake could point to a strange, undiscovered new species. When a young boy disappears in a sand dune, satellite images help with the investigation.

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Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014. An astronaut spots something strange in the Sahara Desert. A mysterious orange sludge invades a remote village in Alaska.

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A buried monument offers new evidence about one of the Bible's greatest mysteries. A giant shadow engulfs the Pacific Ocean. Scientists have trouble explaining a strange lake that's shaped like a perfect circle, and is home to otherworldly life.

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A dagger sealed in King Tut's tomb for more than 3,000 years is made of a metal that seems to have extraterrestrial origins. A massive swastika is found in the desert near Roswell, NM. Satellites hunt for the world's most wanted man, Joseph Kony.

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A heavily armored force takes over one of Syria's most ancient archaeology sites, prompting fears that its relics are being stolen. Tanks appear to be facing off in Antarctica next to an unworldly object. A water reservoir in LA suddenly turns black.

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A sinister giant swastika appears in a forest in Germany. A strange pattern is etched into the desert near the famous Nazca lines, but archaeologists don't know who put it there. Mysterious markings are spotted in an isolated corner of Antarctica.

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Satellite images reveal how El Chapo escaped from a high security prison in Mexico. Mysterious patterns in the Australian outback and the Kalahari Desert spark a major scientific investigation. A giant black stain appears in a war-torn area of Iraq.

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A giant letter Z is carved into a Mexican hillside, evoking the mark of a legendary outlaw. A strange sighting in Germany points to secrets from the Cold War. Massive, blood-red marks in China prompt fears of a violent government crackdown.

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A strange mass breaches surface of an ocean near Antarctica, sparking rumors of a mythological sea monster. An area of the US-Mexico border becomes an international mystery. Ancient rock carvings depict weird, unearthly beings.

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An amateur archaeologist stumbles open strange symbols scratched into the Kazakhstan Desert; CIA surveillance photographs show what looks like a giant Star of David on the island of Cuba; and a lake in the Brazilian rain forest that turned bright pink.

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A vast structure near the legendary city of Petra points to a bloody past.

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New evidence could lead to the discovery of an ancient civilization.

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A massive chasm in a Siberian forest may be a gate to the underworld.

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Strange images from Colombia could lead researchers to a legendary city.

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Strange images could explain mysterious mummies found in a desert.

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A young boy uses satellite images to uncover lost cities of the Maya.

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